2Na[Al(OH)4] +4H2SO4 (изб) =Na2SO4+Al2(SO4)3+4H2O
N2 + 2O2 ->2 NO2 соединение
2NO2 + H2O -> HNO2 + HNO3 обмен
2HNO3 + Na2O -> 2NaNO3 + H2O обмен
CH3-CH-CH3
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CH3 - CH - C - CH- CH2 - CH3
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<span> CH2-CH3</span>
Pb(NO3)2 + 2NaCl = PbCl2 + 2NaNO3
Pb(CH3COO)2 + 2NaCl = PbCl2 + 2CH3COONa
MgCl2 + 2NaOH = Mg(OH)2 + 2NaCl
Mg(NO3)2 + 2NaOH = Mg(OH)2 + 2NaNO3